<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
    *{
        margin: 0px;
        padding: 0px;
    }
    body{
        background: black ;
    }
    .box{
        width: 1000px;
        height: 42px;
        border: 1px solid red;
        margin: 55px auto;
        background: #ffffff url(./download.png)no-repeat right ;
    }
    .box>ul>li{
        float: left;
        width: 83px;
        height: 42px;
        text-align: center;
        list-style: none;
        line-height: 42px;
        cursor: pointer;
    }
    .box>#a2{
        position: absolute;
        left: 0;
        top: 0;
width: 83px;
height: 42px;
background: #ffffff url(./download.gif) no-repeat right;
    }
</style>
<body>
    <div class="box">
<ul>
    <li>新闻首页</li>
    <li>新闻首页</li>
    <li>新闻首页</li>
    <li>新闻首页</li>
    <li>新闻首页</li>
    <li>新闻首页</li>
    <li>新闻首页</li>
    <li>新闻首页</li>
</ul>
<span class="a2"></span>
    </div>
</body>
</html>